Hi, I rendered some pictures to interpretation my method. You can just use the
'reflection' keyword to render the highlight.

The first one is a scene that contains a point light_source, a (looks_like)
white emission sphere but no_radiosity and no_shadow. A ground, and some
reflection spheres.
You can see the effect.



//----------------start of scene-----------------
#version 3.7

global_settings{
assumed_gamma 1
max_trace_level 8

}
//------------------light source--------------



#declare light_pos = <0, 0.12, -0.5>;
#declare light_color = rgb <0.5,1,1>;

light_source{
light_pos
color light_color
fade_distance 1
fade_power 2
}

#declare light_r = 0.12;
#declare emission_area = 4*pi*light_r*light_r;
sphere{
light_pos, light_r
no_shadow
no_radiosity
    pigment{light_color}
    finish{ambient 0 emission 1 diffuse 0}
}


//-----------------camera--------------------
camera {
 location<3,2,0>
 look_at<0,0,0>
}



//-----------------object--------------------

plane{
<0,1,0>,0
    texture{
    checker
        texture{pigment{rgb <0.7,0.65,0.1>} finish{ambient 0 diffuse 1
brilliance 1.5 reflection{0.02,0.52 falloff 3}}},
        texture{pigment{rgb <0.7,0.65,0.1>} finish{ambient 0 diffuse 1}}
    scale <0.6,1,1.5>
    rotate <0,45,0>
    }
}




#declare sphere1=
sphere{
<0,0.14,0.3>, 0.14
    texture{
        pigment{rgb<0.19,0.18,0.19>}
        finish{ambient 0 diffuse 1 brilliance 1.5 reflection {0.01,0.2 falloff
3}}
    }
}


#declare GOLDEN_RATIO = (1+sqrt(5))/2;
#declare sitting_r = 4;
#declare sitting_center = <0,0,0>;
#declare sphere_amount = 250;
#for(i, 20, 49)
    #local this_r = sqrt(1/2+i)/sqrt(sphere_amount);
    #local this_theta = i*2*pi*(1-1/GOLDEN_RATIO);
    #local this_point = <this_r*cos(this_theta), 0,
this_r*sin(this_theta)>*sitting_r;
    object{
    sphere1
    translate sitting_center + this_point
    }
#end


//----------------end of scene---------------

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